12508817 has 2 divisors, whose sum is σ = 12508818. Its totient is φ = 12508816.

The previous prime is 12508789. The next prime is 12508819. The reversal of 12508817 is 71880521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10523536 + 1985281 = 3244^2 + 1409^2 .

It is an emirp because it is prime and its reverse (71880521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12508817 - 2¹² = 12504721 is a prime.

Together with 12508819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12508819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6254408 + 6254409.

It is an arithmetic number, because the mean of its divisors is an integer number (6254409).

Almost surely, 2^12508817 is an apocalyptic number.

It is an amenable number.

12508817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12508817 is an equidigital number, since it uses as much as digits as its factorization.

12508817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 12508817 is about 3536.7805982277. The cubic root of 12508817 is about 232.1339953743.

The spelling of 12508817 in words is "twelve million, five hundred eight thousand, eight hundred seventeen".